つまびらかでわありませんでした
詳らかではありませんでした
tsumabirakadewārimasendeshita

Desu Copula
na-Adjective

The polite, past negative form of つまびらか

1. Was not clear.; Was not evident.; Was not obvious.

Past/Perfective
Negative
Polite
Formal Register
Usually Written in Kana